2010 · Q62
Two circles touch each other externally at P. Two secants APB and CPD are drawn through P to meet the circle at A, C and B, D respectively. Then, which one of the following is correct ?
Elementary MathematicsGeometry
- AAC is perpendicular to BD
- BAC intersects BD
- CAC is parallel to BD
- DNone of the above
Explanation
Homothety at P maps one circle to the other, so AC∥BD.